Ch. 13, 15 gas & solution **test ** [85 points] Chemistry

Show your work in an organized manner, includes any relevant equation / formula, proper units in your work / answer, and the proper number of significant figures in your answer.

1. solve for the unknown temperature [10 points]

Initial

Final

Temperature

25 °C

?

Volume

11.2 L

22.4 L

Other variables

?

unchanged

2. A 5.0 L container at 325 K contains 10.0 g H _{2}, 20.0 g Ne, and 30.0 g Cl _{2}. [20 points]

a. what is the partial pressure of neon in the container ?

b. what is the total pressure in the container ?

3. C _{2}H _{6 (g) }+ O _{2 (g)} --> CO _{2 (g)} + H_{ 2}O _{(g)}

5.0 L 10.0 L

The reactants are at 475 K and the partial pressure of each gas was 5.0 atm. What is the volume of CO _{2} produced at STP ? [20 points]

4. What is the molarity of an aqueous solution containing 5.0 % glucose ? [glucose = C _{6}H _{12}O _{6}; assume that the density of the solution is 1.05 g / mL]? [10 points]

5. H _{2}SO _{4 (aq)} + NaOH _{(aq)} --> Na _{2}SO _{4 (aq)} + H _{2}O _{(l)}

In an acid – base titration experiment, 15.0 mL of a 1.0 M H _{2}SO _{4} solution was needed to titrate 50.0 mL NaOH solution. Determine the [NaOH]. [10 points]

6. Na _{2}CO _{3 (aq)} + FeCl _{3 (aq) --> } ____ grams of a precipitate. [15 points]

10.0 mL 5.0 mL

20.0 mM 30.0 mM